Dragontree Offshoot, Drambled

[AUTO]:When this unit is placed on (RC) other than during the battle phase, if you have a grade 3 or greater vanguard with "Gandeeva" or "Griphogila" in its card name, [COST][Soul-Blast 1], look at the top seven cards of your deck, choose up to one card with "Scarlet Flame" in its card name or up to one "Masque of Hydragrum" from among them, discard it, shuffle the deck, choose one of your opponent's rear-guards, and retire it.